Patents by Inventor Shalini S. Periyalwar
Shalini S. Periyalwar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9264176Abstract: The system and method of the present invention uses a plurality of carriers by assigning user terminals to the plurality of carriers so that a minimum grade of service is met and so that throughput is maximized. Each serviced user terminal reports the channel quality of each of a plurality of carriers to a servicing base station(s). The reported channel qualities are then converted to maximum supported data rates for each of the user terminals and each of the carriers. These data rates are then used to allocate data service levels and data rates for each of the user terminals so that a minimum grade of service is met for each of the user terminals. Forward link transmissions, e.g., frames/data packets carried on forward channels (F-CHs), are then constructed and transmitted to meet the allocations.Type: GrantFiled: August 1, 2005Date of Patent: February 16, 2016Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 8976734Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: GrantFiled: August 14, 2013Date of Patent: March 10, 2015Assignee: Apple Inc.Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 8681705Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: GrantFiled: July 24, 2012Date of Patent: March 25, 2014Assignee: Apple Inc.Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Publication number: 20130329644Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: ApplicationFiled: August 14, 2013Publication date: December 12, 2013Applicant: APPLE INC.Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Publication number: 20120287861Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: ApplicationFiled: July 24, 2012Publication date: November 15, 2012Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 8254284Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: GrantFiled: December 29, 2008Date of Patent: August 28, 2012Assignee: Apple Inc.Inventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 7756520Abstract: A method and apparatus are provided for selecting an optimum base station for communicating with a terminal in a wireless communication system. A base station controller stores two candidate sets for each terminal within communication range of the base stations controlled by the base station controller. One candidate set lists base stations for which the channel quality of the uplink channel between the base station and the terminal is acceptable for communication. The other candidate set lists base stations for which the channel quality of the downlink channel between is acceptable for communication. This allows the base station controller to take into account the predominant direction of traffic when assigning base stations for communication with the terminal.Type: GrantFiled: October 17, 2001Date of Patent: July 13, 2010Assignee: Nortel Networks LimitedInventors: Bassam M. Hashem, Shalini S. Periyalwar, Yoon Chae Cheong
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Patent number: 7596123Abstract: A frame structure that is ordinarily optimized for providing variable high data rates also includes the flexibility to efficiently carry lower data rate, lower latency frames using sub-framing. Superframes, each comprised of a predetermined number of frames, carry voice and data communications at one or more variable data rates. The size of a superframe is limited, such as by the delay tolerance for voice transmission, typically 20 ms. Each voice customer is allotted one or more frames or portions of frames within the superframe, called sub-frames, as is needed to deliver the lower data rate, low latency voice communication. The allocation for the voice customers is not fixed, but varies as the data rate varies over time. Any bits in a frame that are not needed to carry voice communication are assigned to carry data having compatible data rate requirements. Additionally, the sub-framing concept may be extended to include ATM cells.Type: GrantFiled: May 9, 2005Date of Patent: September 29, 2009Assignee: Nortel Networks LimitedInventors: Shalini S. Periyalwar, Wen Tong, Leo L. Strawczynski
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Publication number: 20090103480Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: ApplicationFiled: December 29, 2008Publication date: April 23, 2009Applicant: NORTEL NETWORKS LIMITEDInventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 7483389Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: GrantFiled: May 16, 2006Date of Patent: January 27, 2009Assignee: Nortel Networks LimitedInventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 7463600Abstract: A frame structure that is optimized for providing variable high data rates. Superframes, each comprised of a predetermined number of frames, carry data communications at one or more variable data rates. Each data customer is allotted one or more frames or portions of frames within the superframe, called sub-frames, as is needed to deliver the data communication. The allocation for the data customers is not fixed, but varies as the data rate varies over time, and also to meet the needs of the data customers. Each high speed data frame includes a self-indication of the contents of the high speed data frame. This self-indication identifies one or more data users serviced by the high speed data frame and the data rate of the data contained in the high speed data frame. Each high speed data frame may service multiple user terminals, with the high speed data frame subdivided into two or more subframes.Type: GrantFiled: January 19, 2001Date of Patent: December 9, 2008Assignee: Nortel Networks LimitedInventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 7414964Abstract: A method and apparatus are provided for selecting and signalling the identity of sub-carriers to be used for transmission of data in a radio communication system, and for using other sub-carriers. A remote unit determines which sub-carriers are acceptable for use in data transmission by comparing the signal to interference ratio of each sub-carrier with a threshold. A sequence of numbers is generated using one set of values to identify acceptable sub-carriers and another set of values to identify unacceptable sub-carriers. The sequence of numbers is transmitted to a base station. The average signal to interference ratio of sub-carriers whose signal to interference ratio was above the threshold can also be transmitted to the base station, thereby allowing the base station to determine an optimum set of transmission parameters for use only in the acceptable sub-carriers. Alternatively, the remote unit can determine the optimum set of transmission parameters itself for transmission to the base station.Type: GrantFiled: February 3, 2006Date of Patent: August 19, 2008Assignee: Nortel Networks LimitedInventors: Bassam M. Hashem, David G. Steer, Shalini S. Periyalwar
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Patent number: 7289427Abstract: A method and apparatus are provided for error correction in a communication system employing Orthogonal Frequency Division Multiplexing. When a remote unit receives an OFDM symbol, a retransmission indicator bit is examined to determine whether the symbol is an original symbol or a retransmitted symbol. If it is a retransmitted symbol and the remote unit has a corresponding symbol stored in memory, then the received symbol is soft-combined with the stored symbol. Each packet in the symbol, either the received symbol if original or the soft-combined symbol if retransmitted, is examined by the remote unit. If the remote unit determines that a particular packet is intended for the remote unit, but can not determine the contents of the payload of the packet, the remote unit sends a retransmission request to the base station for retransmission of the symbol.Type: GrantFiled: September 6, 2006Date of Patent: October 30, 2007Assignee: Nortel Networks LimitedInventors: David G. Steer, Shalini S. Periyalwar, Koon Hoo Teo, Yoon Chae Cheong, Bassam M. Hashem
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Patent number: 7110351Abstract: A method and apparatus are provided for error correction in a communication system employing Orthogonal Frequency Division Multiplexing. When a remote unit receives an OFDM symbol, a retransmission indicator bit is examined to determine whether the symbol is an original symbol or a retransmitted symbol. If it is a retransmitted symbol and the remote unit has a corresponding symbol stored in memory, then the received symbol is soft-combined with the stored symbol. Each packet in the symbol, either the received symbol if original or the soft-combined symbol if retransmitted, is examined by the remote unit. If the remote unit determines that a particular packet is intended for the remote unit, but can not determine the contents of the payload of the packet, the remote unit sends a retransmission request to the base station for retransmission of the symbol.Type: GrantFiled: December 19, 2000Date of Patent: September 19, 2006Assignee: Nortel Networks LimitedInventors: David G. Steer, Shalini S. Periyalwar, Koon Hoo Teo, Yoon Chae Cheong, Bassam M. Hashem
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Patent number: 7072307Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.Type: GrantFiled: January 18, 2001Date of Patent: July 4, 2006Assignee: Nortel Networks LimitedInventors: Wen Tong, Leo L. Strawczynski, Shalini S. Periyalwar, Claude Royer
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Patent number: 7031753Abstract: A method and apparatus are provided for selecting and signalling the identity of sub-carriers to be used for transmission of data in a radio communication system, and for using other sub-carriers. A remote unit determines which sub-carriers are acceptable for use in data transmission by comparing the signal to interference ratio of each sub-carrier with a threshold. A sequence of numbers is generated using one set of values to identify acceptable sub-carriers and another set of values to identify unacceptable sub-carriers. The sequence of numbers is transmitted to a base station. The average signal to interference ratio of sub-carriers whose signal to interference ratio was above the threshold can also be transmitted to the base station, thereby allowing the base station to determine an optimum set of transmission parameters for use only in the acceptable sub-carriers. Alternatively, the remote unit can determine the optimum set of transmission parameters itself for transmission to the base station.Type: GrantFiled: December 18, 2003Date of Patent: April 18, 2006Assignee: Nortel Networks LimitedInventors: Bassam M. Hashem, David G. Steer, Shalini S. Periyalwar
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Patent number: 7032153Abstract: A method and system for providing dynamic ARQ, on a per packet basis, in a wireless telecommunications access network. By taking into consideration both per packet QoS based on, for example, packet delay bound, and potential delays caused by retransmission, a dynamic NAK-based ARQ scheme is presented that dynamically adapts the retransmission parameters to the per packet QoS to provide improved radio link quality, particularly for non-delay sensitive services and applications. The ARQ parameters that are dynamically adjusted can include the number of retransmission rounds, and the number of retransmissions in each round.Type: GrantFiled: November 28, 2000Date of Patent: April 18, 2006Assignee: Nortel Networks LimitedInventors: Hang Zhang, Mo-Han Fong, Shalini S. Periyalwar
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Patent number: 6930470Abstract: A method, device and base station for using a code division multiple access carrier for wireless reverse link communication between the device and the base station. An operational profile of the device is determined in which the operational profile includes a degree of unit mobility. A first carrier for wireless code division multiple access communication from the device to the base station is selected based on the determined operational profile of the device. A wireless communication link between the device and the base station is established using the first carrier. According to one aspect, the first carrier is one of an asynchronous code division multiple access signal and a synchronous code division multiple access signal.Type: GrantFiled: March 1, 2001Date of Patent: August 16, 2005Assignee: Nortel Networks LimitedInventors: Shalini S. Periyalwar, Bassam M. Hashem, Leo L. Strawczynski
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Patent number: 6907020Abstract: A frame structure that is ordinarily optimized for providing variable high data rates also includes the flexibility to efficiently carry lower data rate, lower latency frames using sub-framing. Superframes, each comprised of a predetermined number of frames, carry voice and data communications at one or more variable data rates. The size of a superframe is limited, such as by the delay tolerance for voice transmission, typically 20 ms. Each voice customer is allotted one or more frames or portions of frames within the superframe, called sub-frames, as is needed to deliver the lower data rate, low latency voice communication. The allocation for the voice customers is not fixed, but varies as the data rate varies over time. Any bits in a frame that are not needed to carry voice communication are assigned to carry data having compatible data rate requirements. Additionally, the sub-framing concept may be extended to include ATM cells.Type: GrantFiled: April 12, 2001Date of Patent: June 14, 2005Assignee: Nortel Networks LimitedInventors: Shalini S. Periyalwar, Wen Tong, Leo L. Strawczynski
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Patent number: 6885679Abstract: Methods, receivers and transmitters all adapted to assist in the performance of layer 2 frame delineation are provided which are applicable in the context of OFDM, and also applicable to any layer 1 design facilitating high data rate transmission. Advantageously, the invention allows the identification of where a layer 2 frame begins notwithstanding the fact that the previous layer 2 header, which would normally be used to identify the location of the next layer 2 frame, has been received in error. As a consequence, rather than discarding considerable quantities of data after an erroneous header, for example all data until a super-frame boundary, layer 2 frames can be correctly received staring with the next header received in a non-erroneous layer 1 frame.Type: GrantFiled: September 29, 2000Date of Patent: April 26, 2005Assignee: Nortel Networks LimitedInventors: Yoon Chae Cheong, Bassam M. Hashem, Shalini S. Periyalwar